铬酸钡液相氧化2-甲基萘制备2-甲基-1,4-萘醌的工艺研究  

Study on the preparation process of 2-methyl-1,4-naphthoquinone by liquid phase oxidation of 2-methylnaphthalene with barium chromate

作　　者：曾奎 姜启彬 封承飞 全学军[1] 邱发成 ZENG Kui;JIANG Qi-bin;FENG Cheng-fei;QUAN Xue-jun;QIU Fa-cheng(Institute of Chemistry and Chemical Engineering,Chongqing University of Technology,Chongqing 400045,China)

机构地区：[1]重庆理工大学化学化工学院,重庆400045

出　　处：《应用化工》2022年第4期1032-1035,1041,共5页Applied Chemical Industry

基　　金：重庆市高校优秀成果转化项目(KJZH17128);重庆市社会民生保障科技创新项目(cstc2017shmsA100009);重庆理工大学研究生创新项目(clgycx 20202055)。

摘　　要：以2-甲基萘(2-MN)为原料,在盐酸介质中以铬酸钡为氧化剂进行液相氧化制备2-甲基-1,4-萘醌(2-MNQ)。分别考察了超声预处理反应物时间、反应时间、盐酸用量、氧化剂用量、液固比、反应温度对2-MNQ收率的影响。研究表明,在超声预处理时间为20 min,反应时间3.5 h,盐酸用量为理论盐酸用量的1.2倍,铬酸钡与2-甲基萘的摩尔比为2.5,液固比5 mL/g,反应温度75℃条件下,2-MNQ的收率可达49.86%,比当前重铬酸钠液相氧化2-MN制备2-MNQ收率大约提高10个百分点。并用X射线衍射(XRD)、红外光谱对产品进行了确证。2-Methyl-1,4-naphthoquinone(2-MNQ)was prepared by liquid-phase oxidation of 2-methylnaphthalene(2-MN)with barium chromate in hydrochloric acid medium.The effects of the ultrasonic pretreatment reaction time,reaction time,the amount of hydrochloric acid,the amount of oxidant,liquid-solid ratio,and reaction temperature on the yield of the target product 2-MNQ were studied and the appropriate oxidation conditions were determined.Research shows that the ultrasonic pretreatment time is 20 min,the reaction time is 3.5 h,the amount of hydrochloric acid is 1.2 times for the theoretical amount of hydrochloric acid,the molar ratio of barium chromate to the raw material 2-MN is 2.5,the liquid-solid ratio is 5 mL/g,and the reaction temperature is 75℃under the conditions,the yield of the target product 2-MNQ can reach 49.86%,which is about 10%higher than the current yield of 2-MNQ prepared by sodium dichromate liquid phase oxidation of 2-MN.The product was confirmed by XRD and infrared spectroscopy.

关 键 词：铬酸钡 2-甲基萘 2-甲基-1 4-萘醌 液相氧化 

分 类 号：TQ244[化学工程—有机化工]